A feature lacking in LibreOffice holding me to make the switch is the ability for the IDE to auto complete (ie. give suggestions according to the API) when writing code.
For example, when writing a VBA macro with MS Office, if I write:
"Object.", then after a couple of milisseconds (or after pressing Ctrl+Space), a drop-down list with the possible methods and variables are shown.
This makes coding a lot faster, because I don´t need to keep switching windows to consult the LibreOffice API in almost every line of code written on the web browser.

Hi Alberto,
Thanks for writing this long existing wish in an issue.
I set the version against 3.3.0 - it's obviously inherrited behaviour from OOo.
Also, knowing the discussions, there are some technical reasons why this probably is not an easy to resolve issue ;)
Pls look for support with XRay and examples, forums to help you master LibreOffice scripting !
Regards,
Cor

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Is "YouCompleteMe — Ultimate Autocomplete Plugin for Vim" useful here? The link below shows a demo of YCM.
http://www.alexeyshmalko.com/2014/youcompleteme-ultimate-autocomplete-plugin-for-vim/
"Quick overview
YouCompleteMe (YCM) is a fast, as-you-type code completion engine for Vim. It combines output from several sources: an identifier-based engine that works with every programming language, a semantic, Clang-based engine that provides native semantic code completion for C/C++/Objective-C/Objective-C++ (from now on referred to as “the C-family languages”), a Jedi-based completion engine for Python, an OmniSharp-based completion engine for C# and an omnifunc-based completer that uses data from Vim’s omnicomplete system to provide semantic completions for many other languages (Ruby, PHP etc). And prioritize them with a complex algorithm."
The quick overview states that YCM has a completion engine for Python.
The upcoming LO 5.1 has a feature:
"Make PyUNO provide more Pythonic behaviour (Matthew J. Francis)"
https://wiki.documentfoundation.org/ReleaseNotes/5.1#Make_PyUNO_provide_more_Pythonic_behaviour_.28Matthew_J._Francis.29
Perhaps YCM could be utilized in the IDE.
More information about YouCompleteMe (YCM) available here:
https://github.com/Valloric/YouCompleteMe
Thank you